<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>记事本</title>
    <link rel="stylesheet" href="记事本.css">
    <script src="vue.js"></script>
</head>

<body>
    <!-- 主体区域 -->
    <section id="todoapp">
        <!-- 输入框 -->
        <header class="header">
            <h1>小黑记事本</h1>
            <input placeholder="请输入任务" class="new-todo" v-model="message" @keyup.enter="add" />
        </header>
        <!-- 列表区域 -->
        <section class="main">
            <ul class="todo-list">
                <li class="todo" v-for="(item, index) in list">
                    <div class="view">
                        <span class="index">{{index+1+"."}}</span>
                        <label>{{item}}</label>
                        <button class="destroy" @click="del(index)"></button>
                    </div>
                </li>
            </ul>
        </section>
        <!-- 统计和清空 -->
        <footer class="footer" v-if="list.length!=0">
            <span class="todo-count">
                <strong>{{list.length}}</strong> items left
            </span>
            <button class="clear-completed" @click="alldel">
                Clear
            </button>
        </footer>
    </section>
    <!-- 底部 -->
    <!-- <footer class="info">
    <p>
      <a href="http://www.itheima.com/"><img src="./img/black.png" alt="" /></a>
    </p>
  </footer> -->
    <script>
        var app = new Vue({
            el: "#todoapp",
            data: {
                list: [
                    "Java",
                    "Jquery",
                    "php"
                ],
                message: "请输入任务",
            },
            methods: {
                add: function () {
                    this.list.push(this.message);
                    this.message="";
                },
                del:function(index){
                    this.list.splice(index,1);
                },
                alldel:function(){
                    this.list=[];
                }
            },
        });
    </script>
</body>

</html>